Now that the “golden master” of Mac OS X 10.8 Mountain Lion has been sent to developers, Apple is encouraging developers to get their apps ready for the next rev of the operating system.

The company has sent an email to developers reminding them that Mountain Lion-ready apps are being reviewed by the Mac App Store team, according to “AppleBitch” ( Mountain Lion is due before the end of the month; it will be available for US$29 at the Mac App Store.